65% (1967)

65% (1966)

63% (1972)

66% (1980)

62% (1972)

57% (1966)

57% (1973)

53% (1979)

56% (1972)

55% (1975)

62% (1971)

65% (1986)

59% (1970)

67% (1957)

63% (1956)

61% (1969)

46% (1976)

70% (1957)

66% (1958)

68% (1956)